You can edit your configuration file and enable logging. In my.cnf look for:
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# log = /var/log/mysql/mysql.log
Uncomment the log line than you can use tail to monitor the queries:
tail -f /var/log/mysql/mysql.log
You need to restart the server to apply the new configuration.
